Patent · US Expired

Method and apparatus for the comminution of material for grinding

US5375776A · kind A · utility

24Cited by

8References

17Claims

0Family size

Assignee

Krupp Polysius AG · DE

Inventors

Detlev Kupper · Telgte, DE
Osbert R. Knobloch · Rheda-Wiedenbrück, DE
Ludger Kimmeyer · Beckum, DE
Werner Brosowski · Hamm, DE

Key dates

Filing date	Oct 19, 1993
Grant date	Dec 27, 1994
Priority date	—
Expiry date	Oct 19, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/10
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to the comminution of material for grinding, particularly for the production of cement, wherein the material for grinding is comminuted in a mill and the comminution product is classified in a classification zone into fines and oversize material and the oversize material is returned to the mill. With a view to effective influencing of the breadth of the particle size distribution as well as a relatively low specific energy consumption the comminution product is classified in the classification zone in at least two air separators which are connected one behind the other in series, and a proportion of the oversize material from the first air separator is returned directly to the mill, the remaining proportion being delivered to the second air separator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.